weird "which" behaviour

From: San Martin, Carmen <carmen_at_wistar.upenn.edu>
Date: Mon, 07 Dec 1998 13:06:09 -0500 (EST)

  Dear managers,

  had you ever seen this error before?

  $ which
then: then/endif not found.

  And, what does it mean (or where can I find info about fixing it)?

  This happens in a new Alpha server running OSF/1 4.0d.

  Thanks in advance,

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Received on Mon Dec 07 1998 - 18:10:13 NZDT